CN109041219B

CN109041219B - Communication method and device

Info

Publication number: CN109041219B
Application number: CN201710433665.5A
Authority: CN
Inventors: 樊波; 刘亚林
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-06-09
Filing date: 2017-06-09
Publication date: 2020-12-04
Anticipated expiration: 2037-06-09
Also published as: US20200112940A1; US11272478B2; EP3606199A1; CN109041219A; EP3606199B1; WO2018223989A1; EP3606199A4

Abstract

The application discloses a communication method and equipment, wherein the method comprises the following steps: a first base station sends a first request message, wherein the first request message is used for requesting one or more second base stations located in a paging notification area of a target terminal to page the target terminal; if the first base station receives a second request message sent by one of the one or more second base stations within a preset time length, wherein the second request message is used for acquiring the context of the target terminal, the first base station sends the context of the target terminal to the second base station sending the second request message; by adopting the method and the equipment, the paging of the terminal equipment in the third state can be realized.

Description

Communication method and device

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a communication method and device.

Background

In a Long Term Evolution (LTE) system, a terminal device has two Radio Resource Control (RRC) states, namely, an RRC _ CONNECTED state and an RRC _ IDLE state. As shown in fig. 1, in the RRC _ CONNECTED state, both RRC connection and S1AP connection exist. In the RRC _ IDLE state, both the RRC connection and the S1AP connection are interrupted. The RRC connection refers to a connection between a terminal and a base station, and the S1AP connection refers to a connection between a base station and a core network.

Currently, in 5G communication systems, a new RRC state is introduced, hereinafter referred to as a third state, in which an S1AP connection is present and an RRC connection is not present, and still referring to fig. 1. In the third state, the terminal cannot receive data from the core network. However, since the S1AP connection exists, the core network cannot distinguish whether the terminal is in the RRC _ CONNECTED state or the third state, and the core network may default that the terminal is in the RRC _ CONNECTED state. As shown in fig. 3, when a core network wants to send data to a target terminal, the core network sends the data to a base station corresponding to the target terminal (hereinafter referred to as an anchor base station), and after receiving the data of the core network, the anchor base station how to page the target terminal does not have a good solution at present.

Disclosure of Invention

The application provides a communication method and equipment, so as to realize paging of terminal equipment in a third state.

In a first aspect, a communication method is provided, including: a first base station sends a first request message, wherein the first request message is used for requesting one or more second base stations located in a paging notification area of a target terminal to page the target terminal; if the first base station receives a second request message sent by one of the one or more second base stations within a preset time length, where the second request message is used to obtain the context of the target terminal, the first base station sends the context of the target terminal to the second base station that sends the second request message.

By the method, the first base station triggers the paging of the target terminal, and the paging area triggered by the base station is smaller than the paging area triggered by the core network, so the method can save the paging power consumption.

In one possible design, the preset duration is a preset duration timed by a timer, and the sending, by the first base station, a first request message includes: the first base station starts a timer; the first base station sends a first request message;

the first base station receives, within a preset time period, a second request message sent by a second base station of the one or more second base stations, where the second request message includes: and the first base station receives a second request message sent by one second base station in one or more second base stations within the preset time length timed by the timer.

In one possible design, the method provided in the first aspect further includes: if the first base station does not receive a second request message sent by one of the one or more second base stations within a preset time length, judging whether the number of times that the first base station sends the first request message reaches a preset value; and if the number of times of sending the first request message by the first base station reaches the preset value, sending a paging failure indication message to core network equipment.

By the method, the first base station sends the paging failure indication message to the core network equipment to trigger the paging of the core network to the terminal equipment if the second request message responding to the first request message is not received within the preset time length of sending the first request message. Therefore, by adopting the method of the application, the first base station can be prevented from waiting for a long time after sending the first request message, and the communication time delay is reduced.

In one possible design, the method provided in the first aspect further includes: and if the number of times of sending the first request message by the first base station does not reach the preset value, adding 1 to the number of times of sending the first request message, and executing the steps of sending the first request message again, if the number of times of sending the first request message by the first base station does not reach the preset value, receiving a second request message sent by one second base station of the one or more second base stations within a preset time length, sending the context of the target terminal to the second base station sending the second request, and if the number of times of sending the first request by the first base station does not reach the preset value within the preset time length, not receiving the second request message sent by one second base station of the one or more second base stations.

In one possible design, the method provided in the first aspect further includes: and if the first base station does not receive a second request message sent by one of the one or more second base stations within a preset time length, sending a paging failure indication message to core network equipment.

By the method, the first base station sends the paging failure indication message to the core network equipment if the second request message responding to the first request message is not received within the preset time length of sending the first request message, and the core network triggers the paging of the terminal equipment, so that the success rate of the paging of the target terminal can be ensured.

In one possible design, the first base station sends the first request message through an Xn or X2 port and the first base station receives the second request message through an Xn or X2 port.

In one possible design, the first base station sends the paging failure indication message through an NG port or an S1 port.

In one possible design, the paging failure indication message includes a message type field and a terminal identification field, the message type field is used for indicating the type of the paging failure indication message, and the terminal identification field is used for indicating the identification of the paged target terminal.

In one possible design, the first request message includes at least a terminal identification field and a paging range area field, where the paging range area field is used to indicate a range area of the second base station for paging a target terminal; the terminal identification field is used for indicating the identification of the paged target terminal.

In one possible design, the first request message includes an international mobile subscriber identity, IMSI, field indicating at least one bit of an IMSI of the paged target terminal.

In one possible design, a discontinuous reception, DRX, cycle field is included in the first request message, and the DRX cycle field is used to indicate a DRX cycle of the target terminal.

In the application, the IMSI field and the DRX cycle field are used for the second base station to calculate the time when the terminal device wakes up, and the second base station sends the paging message at the time when the terminal device wakes up, so that the second base station can be prevented from unintentionally sending the paging message, and the power consumption of the second base station is saved.

In a second aspect, a communication method is provided, including: a second base station receives a first request message sent by a first base station, wherein the first request message is used for requesting the second base station positioned in a paging notification area of a target terminal to page the target terminal; the second base station sends a paging message, and the paging message is used for paging a target terminal; when receiving a response message sent by the target terminal, the second base station sends a second request message to the first base station, wherein the second request message is used for acquiring the context of the target terminal; and the second base station receives the context of the target terminal sent by the first base station.

In one possible design, the response message is an RRC connection setup confirm message or an RRC connection recovery confirm message.

In one possible design, the second base station receives the first request message through an Xn or X2 port and the second base station sends the second request message through an Xn or X2 port.

In one possible design, the first request message includes at least a terminal identification field and a paging range area field, where the paging range area field is used to indicate a range area of a second base station that pages the target terminal, and the terminal identification field is used to indicate an identification of a paged target terminal.

In one possible design, a discontinuous reception, DRX, cycle field is included in the first request message to indicate a DRX cycle of the target terminal.

In one possible design, the second base station transmits a paging message, including: the second base station calculates the awakening time of the target terminal based on the IMSI field and the DRX period field in the first request message; and the second base station sends the paging message at the awakening time of the target terminal.

In one possible design, the paging message includes a first identifier of the paged target terminal, or a second identifier of the paged target terminal, where the first identifier is a temporary mobile subscriber identity S-TMSI or an international mobile subscriber identity IMSI of the paged target terminal, and the second identifier is another identifier of the paged target terminal except the S-TMSI or the IMSI.

In a third aspect, a paging method is provided, including: the method comprises the steps that core network equipment receives a paging failure indication message sent by a first base station, wherein the paging failure indication message is used for indicating that the process of paging a target terminal by the first base station fails; and the core network equipment triggers the paging of the target terminal based on the paging failure indication message.

In one possible design, the paging failure indication message is configured to include a message type field and a terminal identification field, the message type field is configured to indicate a type of the paging failure indication message, and the terminal identification field is configured to indicate an identification of a paged target terminal.

In one possible design, the core network device receives the paging failure indication message through an NG port or an S1 port.

In a fourth aspect, a paging method is provided, including: a terminal device receives paging messages sent by one or more second base stations, wherein the paging messages are sent when the one or more second base stations receive a first request message sent by a first base station, and the first request message is used for requesting the one or more second base stations located in a paging notification area of the terminal device to page a target terminal; and the terminal equipment sends a response message to one of the one or more second base stations, wherein the response message is used for establishing Radio Resource Control (RRC) connection between the terminal equipment and the second base station.

In one possible design, the sending, by the terminal device, a response message to one of the one or more second base stations includes: the terminal equipment receives paging messages sent by a plurality of second base stations; the terminal equipment selects a second base station with the cell quality meeting the requirement from the plurality of second base stations; and the terminal equipment sends a response message to the second base station with the cell quality meeting the requirement, wherein the response message is used for establishing RRC connection between the terminal equipment and the second base station with the cell quality meeting the requirement.

In one possible design, the sending, by the terminal device, a response message to the second base station whose cell quality meets the requirement includes: and when the terminal equipment determines that the paging message contains the first identifier of the terminal equipment, the terminal equipment sends an RRC connection establishment confirmation message to a second base station with the cell quality meeting the condition.

In one possible design, the sending, by the terminal device, a response message to the second base station whose cell quality meets the requirement includes: and when the terminal equipment determines that the paging message comprises the second identifier of the terminal equipment, sending an RRC connection recovery confirmation message to a second base station with the cell quality meeting the requirement.

In one possible design, the sending, by the terminal device, a response message to one of the one or more second base stations includes: the terminal equipment receives a paging message sent by a second base station; and the terminal equipment sends a response message to the second base station, wherein the response message is used for establishing RRC connection between the terminal equipment and the second base station.

In one possible design, the sending, by the terminal device, the response message to the one second base station includes: and the terminal equipment sends an RRC connection establishment confirmation message to the second base station when determining that the paging message sent by the second base station comprises the first identifier of the terminal equipment.

In one possible design, the sending, by the terminal device, the response message to the one second base station includes: and the terminal equipment sends an RRC connection recovery confirmation message to the second base station when determining that the paging message sent by the second base station comprises the second identifier of the terminal equipment.

In one possible design, the first identity is a temporary mobile subscriber identity, S-TMSI, or an international mobile subscriber identity, IMSI, of the terminal device.

In one possible design, the second identifier is an identifier of the terminal device other than the temporary mobile subscriber identity S-TMSI and the international mobile subscriber identity IMSI.

In a fifth aspect, the present application further provides a first base station, where the first base station has a function of implementing the behavior of the first base station in the method example of the first aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or the software includes one or more modules corresponding to the above-described functions.

In a possible design, the structure of the first base station includes a processor and a transceiver, and the processor and the transceiver may perform corresponding functions in the method example of the first aspect, which is specifically described in detail in the method example of the first aspect, and details are not repeated here.

In a sixth aspect, the present application further provides a second base station, where the second base station has a function of implementing the behavior of the second base station in the method example of the second aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or the software includes one or more modules corresponding to the above-described functions.

In a possible design, the structure of the second base station includes a processor and a transceiver, and the processor and the transceiver may perform corresponding functions in the second method example in the above method example, specifically refer to the detailed description in the second method example, and are not described herein again.

In a seventh aspect, the present application further provides a core network device, where the core network device has a function of implementing the core network device behavior in the example of the third aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or the software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the core network device includes a processor and a transceiver, and the processor and the transceiver may execute corresponding functions in the third method example in the above method example, specifically refer to the detailed description of the third method example, and are not described again here.

In an eighth aspect, the present application further provides a terminal device, where the terminal device has a function of implementing the behavior of the terminal device in the method example of the fourth aspect. The functions may be implemented by hardware. The structure of the terminal equipment comprises a communication module, a processor, a bus, a display panel and a memory. Wherein the processor, the display panel and the memory are connected through the bus; the display panel is used for displaying pictures; the processor invokes instructions stored in the memory to perform the method described above, and the communication module is configured to receive a paging message and transmit a paging message.

In one possible design, the communication module may be an RF circuit, a WIFI module, a communication interface, a bluetooth module, and the like.

In a ninth aspect, the present application further provides a terminal device, where the terminal device has a function of implementing the behavior of the terminal device in the fourth method example. The functions can be realized by hardware, and can also be realized by hardware executing relative original software. The hardware or the software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the terminal device includes a processor and a transceiver, and the processor and the transceiver may perform corresponding functions in the fourth method example in the above method example, specifically refer to the detailed description of the fourth method example, and are not described herein again.

As can be seen from the above, in the present application, a first base station may send a first request to request one or more second base stations located in a paging notification area of a target terminal to page the target terminal, where the second base station sends a second request to the first base station after the target terminal is successfully paged; if the first base station receives a second request message of the second base station within the preset time length, the context of the target terminal is sent to the second base station; at this time, the second base station may establish an RRC connection with the target terminal, and the paging of the second terminal is successful; since the RRC connection between the terminal device in the third state and the base station does not exist, by using the method of the present application, the first base station can page the terminal device after receiving the data sent by the core network to the terminal device.

Drawings

Fig. 1 shows three states of a terminal device provided in the present application;

fig. 2 is a schematic diagram of a target terminal in a third state provided in the present application;

fig. 3 is a process of paging a target terminal by an anchor base station according to the present application;

fig. 4 is another schematic diagram of a target terminal in a state of three provided in the present application;

fig. 5 is a schematic diagram of a communication method provided in the present application;

FIG. 6 is a diagram illustrating a first request message provided herein;

fig. 7 is a diagram illustrating a paging failure indication message provided in the present application;

fig. 8 is a process of paging a target terminal by a core network according to the present application;

fig. 9 is another schematic diagram of a communication method provided herein;

fig. 10 is a schematic structural diagram of a base station provided in the present application;

fig. 11 is a schematic structural diagram of a terminal device provided in the present application;

fig. 12 is a schematic structural diagram of a core network device provided in the present application;

fig. 13 to fig. 16 are schematic structural diagrams of the communication device provided in the present application.

Detailed Description

For ease of understanding, the illustrations of the concepts related to the present application are given for reference as follows:

a Base Station (BS) device, which may also be referred to as a base station, is a device deployed in a radio access network to provide wireless communication functions. For example, a device providing a base station function in a 2G network includes a Base Transceiver Station (BTS) and a Base Station Controller (BSC), a device providing a base station function in a 3G network includes a node B (english NodeB) and a Radio Network Controller (RNC), a device providing a base station function in a 4G network includes an evolved node B (evolved NodeB, eNB), and a device providing a base station function in a WLAN is an Access Point (AP). In a future 5G network, such as New Radio (NR) or LTE +, devices providing base station functionality include node b (gnb) for continued evolution, TRP (transmission and reception point), or TP (transmission point). The TRP or TP may not include a baseband part, only include a radio frequency part, or include a baseband part and a radio frequency part.

A User Equipment (UE) is a terminal device, which may be a mobile terminal device or an immobile terminal device. The device is mainly used for receiving or sending service data. The user equipments may be distributed in networks where the user equipments have different names, such as: a terminal, a mobile station, a subscriber unit, a station, a cellular telephone, a personal digital assistant, a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless telephone, a wireless local loop station, a vehicle mounted device, etc. The user equipment may communicate with one or more core networks via a Radio Access Network (RAN), an access portion of a wireless communication network, for example to exchange voice and/or data with the radio access network.

The core network equipment is connected with a plurality of access networks and comprises a Circuit Switched (CS) domain and a Packet Switched (PS) domain, the CS network element comprises a mobile switching center, an access location register and a gateway mobile switching center, and the PS network element comprises a serving GPRS service node and a gateway GPRS support node. Some network elements such as home location register, visitor location register, authentication center can be shared by CS domain and PS domain.

The third state, referred to as RRC _ INACTIVE state in 3GPP standard discussions. As shown in fig. 1, in the third state, an application protocol (S1AP) connection of the terminal device exists, and a Radio Resource Control (RRC) connection does not exist. The S1AP connection refers to a connection between a core network and a base station, and the RRC connection refers to a connection between a terminal and a base station.

The technical scheme of the application is described in the following with reference to the attached drawings:

still referring to fig. 1, when the terminal device is in the third state, since an S1AP connection of the terminal device is present, the base station managing the terminal may receive data from the core network. However, since the RRC connection of the terminal device is interrupted, the terminal device cannot receive data from the corresponding base station. The method and the device can be applied to the process of paging the terminal equipment in the third state after the base station receives the data sent by the core network.

In the present application, for convenience of distinction, a terminal device to be paged may be referred to as a target terminal, and a base station that manages the target terminal may be referred to as an anchor base station. In the present application, as shown in fig. 2, the target terminal is in the third state, the RRC connection between the target terminal and the anchor base station is broken, and an S1AP connection between the anchor base station and the core network exists.

Fig. 3 shows a schematic diagram of a possible system network according to the present application. As shown in fig. 3, when the core network wants to send data to the target terminal, first, a base station that manages the target terminal, i.e., an anchor base station, is found, and then the data is sent to the anchor base station, and when the anchor base station receives the data and determines that the target terminal is in an RRC interrupt state, a paging process of the target terminal is initiated. The principle of paging is as follows: the method comprises the steps that firstly, an anchor base station determines a paging notification area of a target terminal, and then, a first request message is sent to a base station of the paging notification area of the target terminal. And the base stations in the paging notification area send paging messages to page the target terminal in the respective responsible cell when receiving the first request message. Still referring to fig. 3, if a base station (for convenience of distinction, this base station may be referred to as base station a) within the paging notification area pages to the target terminal, a context request will be sent to the anchor base station. Wherein, after obtaining the context of the target terminal from the anchor base station, the base station a may establish an RRC connection with the target terminal, as shown in fig. 4. At this time, the anchor base station may forward the data sent by the core network to the target terminal to the base station a, and then the base station a sends the data to the target terminal. And for the anchor base station, judging whether the context request of the target terminal can be received within the preset time length, if the context request of the target terminal can be received, determining that the paging process of the anchor base station is successful, otherwise, determining that the paging process of the anchor base station is failed, and requesting the core network to page the target terminal by the anchor base station.

It should be noted that the plurality referred to in the present application means two or more. The terms first, second, etc. described herein are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order.

It should be further noted that, in the present application, a part of the scenarios is described by taking a scenario of a 4G network in a wireless communication network as an example, it should be noted that the solution in the present application may also be applied to other wireless communication networks, and corresponding names may also be replaced by names of corresponding functions in other wireless communication networks.

Fig. 5 is a flowchart of a paging method provided in the present application, where a first base station in the flowchart may correspond to the anchor base station in fig. 2, 3, and 4, a second base station may correspond to the base station located in the paging notification area of the target terminal in fig. 3, and a terminal device may correspond to the target terminal in fig. 2, 3, and 4. As shown in fig. 5, includes:

step S51: a first base station sends a first request message, wherein the first request message is used for requesting one or more second base stations located in a paging notification area of a target terminal to page the target terminal;

in this application, specifically, when the first base station sends the first request message, a timer may be started to record a duration of sending the first request message.

In this application, as shown in fig. 6, the first request message at least includes: a terminal identification field and a paging range area field, wherein the paging range area field is used for indicating a range area of a second base station of a paging target terminal; the terminal identification field is used for indicating the identification of the paged target terminal.

In this application, the content in the terminal identifier field in the first request message may specifically be a Serving-Temporary Mobile Subscriber Identity (S-TMSI), an International Mobile Subscriber Identity (IMSI), or another identifier of the paged target terminal.

In this application, still referring to fig. 6, the first request message may further include: an IMSI field, and a Discontinuous Reception (DRX) cycle field, where the IMSI field is used to indicate at least one bit in an IMSI of a paged target terminal, the DRX cycle field is used to indicate a DRX cycle of the target terminal, the DRX cycle field and the IMSI field are used by the second base station to determine a time for paging the target terminal, and the time for paging the target terminal refers to a time for sending a paging message including an identifier of the target terminal.

In this application, the content in the IMSI field in the first request message may specifically be last N digits in the IMSI of the paged target terminal, where N is a positive integer, and for example, N may be 10.

In this application, the content in the DRX cycle field in the first request message may be specifically a terminal-specific DRX cycle or a cell-specific DRX cycle. The terminal-specific DRX cycle is a DRX cycle specified by the terminal, and the cell-specific DRX cycle is a DRX cycle specified by the cell.

In this application, the first base station may specifically send the first request through an X2 port in the LTE system or an Xn port in the 5G. The X2 port may be specifically a port for mutual communication between base stations in an LTE system, and the Xn port may be specifically a port for mutual communication between base stations in a 5G system.

Step S52: the second base station sends a paging message, and the paging message is used for paging a target terminal;

in this application, the second base station may first acquire the identifier of the paged target terminal from the first request message, and generate a paging message, where the paging message at least includes the identifier of the paged target terminal. In this application, the paging message may specifically carry a first identifier or a second identifier of the paged target terminal, where the first identifier may specifically be an S-TMSI or IMSI of the target terminal, and the second identifier may specifically be another identifier of the target terminal except the S-TMSI or IMSI. Then, the second base station can calculate the waking time of the target terminal based on the DRX period field and the IMSI field in the first request message, and send the paging message during the waking time of the target terminal.

Step S53: the terminal equipment sends a response message to one of the one or more second base stations.

In the application, when a terminal device receives a paging message of a second base station, it will first be determined whether the paging message includes an identifier of a current terminal device; if the paging message exists, the paging message is related to the paging message, namely the paging message pages the current terminal equipment, a response message is sent to the second base station, otherwise, the paging message is not related to the paging message, namely the paging message does not page the current terminal equipment, and the processing is finished. In this application, the response message may be an RRC Connection setup confirm message (RRC ConnectionSetupComplete) or an RRC Connection Resume confirm message (RRC Connection Resume Complete).

In this application, the terminal device may specifically send an RRC connection setup confirmation message to the second base station when the paging message includes the first identifier of the terminal device, and send an RRC connection recovery confirmation message to the second base station when the paging message includes the second identifier of the terminal device.

In this application, for a situation that a terminal device receives paging messages sent by a plurality of second base stations at the same time, if the paging messages of the plurality of second base stations all include an identifier of the terminal device, the terminal device selects a second base station with a cell quality meeting a requirement from the plurality of second base stations (for example, selects a second base station with a best cell quality); and the terminal equipment randomly accesses to a second base station meeting the cell quality requirement, and sends an RRC (radio resource control) confirmation message to the second base station meeting the cell quality requirement after the random access process is finished. When the paging messages of the plurality of second base stations are the first identifiers of the terminal devices, the sent RRC confirmation message may specifically be an RRC connection establishment confirmation message; and when the paging messages of the multiple second base stations are the second identifiers of the terminal devices, the sent RRC confirmation message may specifically be an RRC connection recovery confirmation message.

In the present application, for a situation that the terminal device only receives a paging message sent by one second base station, if the paging message includes an identifier of the terminal device, the terminal device randomly accesses to the one second base station, and sends an RRC acknowledgement message to the one second base station after the random access procedure is completed. In the present application, if the paging message includes the first identifier of the terminal device, an RRC connection setup confirmation message is sent to the second base station; and if the paging message contains the second identifier of the terminal equipment, sending an RRC connection recovery confirmation message to the second base station.

Step S54: the second base station sends a second request message to the first base station, wherein the second request message is used for acquiring the context of the terminal equipment;

in this application, the second request message may be a get terminal device context message, such as a UE centerfetch message.

In this application, the second base station may specifically send the second request message through an Xn or X2 port.

Step S55: the first base station judges whether a second request message sent by one of the one or more second base stations is received within a preset time length, and if so, the step S56 is executed; otherwise, executing step S57;

in the application, the first base station may specifically determine whether the second request message sent by one or more second base stations may be received within a preset duration of the timer, and if the second request message may be received, it may be determined that the paging of the first base station to the target terminal is successful; otherwise, it can be determined that the paging of the first base station to the target terminal fails, and the paging of the core network device to the target terminal is triggered.

Step S56: the first base station sends the context of the terminal device to the second base station.

In the application, after the second base station acquires the context of the terminal device, the second base station can establish RRC connection between the second base station and the terminal device.

Step S57: the first base station sends a paging failure indication message to the core network equipment.

In this application, the paging failure indication message may be a user Context Release Request message, such as a UE Context Release Request.

In this application, as shown in fig. 7, the paging failure indication message at least includes a message type field and a terminal identification field, where the message type field is used to indicate the type of the paging failure indication message, and the terminal equipment identification field is used to indicate the identification of the paged target terminal.

In this application, the first base station may specifically send the paging failure indication message through an NG port or an S1 port. The NG port may be a communication port between a base station and a core network in an LTE system, and the S1 port may be a communication port between a base station and a core in a 5G system.

Step S58: the core network equipment triggers paging of the target terminal.

In this application, as shown in fig. 8, a core network triggers a process of paging a target terminal, as follows: the core network sends a request message in a paging notification area of a target terminal, and a base station positioned in the paging notification area sends a paging message after receiving the request message, so as to page the target terminal. After a certain base station successfully pages the target terminal (see also fig. 8, for example, the base station B successfully pages the target terminal), the base station B will send a UE initialization message to the core network, and the core network will establish an S1AP connection with the base station B when receiving the UE initialization message. And the UE initialization message is a first message sent to a core network by the base station B after the target terminal is successfully accessed to the base station B randomly.

In the application, for the core network side device, if the UE initialization message is not received within the preset duration after the request message is sent, it may be determined that the current paging process for the target terminal fails, and the paging for the target terminal is triggered again. And if the paging to the target terminal is always unsuccessful, and after the paging exceeds a certain number of times, the core network gives up the paging to the target terminal.

It should be noted that, with the method of the present application, the first base station may determine whether the paging of the target terminal is successful, for example, if the second request message is received within a preset time period, it may determine that the paging of the target terminal is successful. And if the second request message is not received within the preset time length, determining that the paging of the target terminal fails. Then, by adopting the method of the present application, the first base station can avoid the long waiting of the second request message after sending the first request message, and the communication time delay is reduced.

It should also be noted that with the method of the present application, a flexible transition from a base station triggered paging mechanism to a core network triggered paging mechanism is achieved. Since the paging notification zone triggered by the base station is smaller than the paging notification zone triggered by the core network, the overhead of the base station for triggering the paging mechanism is smaller than the overhead of the core network for triggering the paging mechanism. In the application, the paging of the target terminal is performed by using a base station triggering mechanism with low overhead. And after the mechanism of triggering paging by the base station fails, switching to the core network triggering mechanism. By adopting the method, the paging cost can be reduced on the basis of ensuring the paging success rate.

Fig. 9 is a flowchart of another paging method provided in the present application, where a first base station in the flowchart may correspond to the anchor base station in fig. 2, 3, and 4, a second base station may correspond to the base station located in the paging notification area of the target terminal in fig. 3, and a terminal device may correspond to the target terminal in fig. 2, 3, and 4. As shown in fig. 9, includes:

step S91: a first base station sends a first request message, wherein the first request message is used for requesting one or more second base stations located in a paging notification area of a target terminal to page the target terminal;

in the present application, the content of the first request message can be shown in fig. 6 and the corresponding description of fig. 6, and is not described herein again.

Step S92: the second base station sends a paging message, and the paging message is used for paging a target terminal;

step S93: the terminal equipment sends a response message to one of the one or more second base stations.

For the response message, reference may be made to the above description, which is not described herein again.

Step S94: the second base station sends a second request message to the first base station, wherein the second request message is used for acquiring the context of the terminal equipment;

step S95: the first base station judges whether the second request message is received within a preset time length, and if the second request message is received, the step S96 is executed; otherwise, step S97 is executed.

Step S96: the first base station sends the context of the target terminal to the second base station.

In this application, after the second base station obtains the context of the target terminal, the second base station may establish an RRC connection with the target terminal.

Step S97: the first base station judges whether the frequency of sending the first request message reaches a preset value; if so, go to step S98; otherwise, go to step S910;

step S98: the first base station sends a paging failure indication message to the core network equipment;

in the present application, for the paging failure indication message, reference may be made to the text records related to fig. 7 and fig. 7, which are not described herein again.

Step S99: the core network equipment triggers paging of a target terminal;

step S910: the first base station adds 1 to the number of times of sending the first request message and returns to step S91 to continue the paging procedure.

In the present application, for the first base station, only when the number of times of paging the target terminal reaches a preset upper limit value, the core network is triggered to page the target terminal. Because the paging triggered by the base station has the cost less than that of the paging triggered by the core network, the method can further reduce the cost for paging the target terminal.

Fig. 10 is a schematic diagram illustrating a possible structure of a base station according to the above embodiment of the present application, where the base station may be the anchor base station in fig. 2, 3, and 4, or the first base station or the second base station in fig. 5 or 9.

In this application, the base station includes a transceiver 101 and a controller/processor 102. The transceiver 101 may be used to support information transceiving between a base station and a terminal device in the above embodiments, and to support radio communication between a base station and a core network device.

The controller/processor 102 is operative to perform various functions for communicating with terminal devices and core network devices. In the uplink, uplink signals from the terminal device are received via the antenna, demodulated by the transceiver 101, and further processed by the controller/processor 102 to recover the traffic data and signaling information sent by the terminal device. On the downlink, traffic data and signaling messages are processed by controller/processor 102 and conditioned by transceiver 101 to generate a downlink signal, which is transmitted via the antenna to the UEs. The controller/processor 102 is further configured to perform the paging method as described in the above embodiments, determine the context of the first request message and the target terminal, or determine the paging message and the second request message. The controller/processor 102 may also be configured to perform the processes of fig. 5 or 9 involving the base station and/or other processes for the techniques described herein. The base station may also include a memory 103 that may be used to store program codes and data for the base station. The base station may further comprise a communication unit 104 for supporting the base station to communicate with other network entities, e.g. for supporting the base station to communicate with the core network device shown in fig. 5 or fig. 9.

It will be appreciated that fig. 10 only shows a simplified design of a base station. In practical applications, a base station may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all base stations that may implement the present application are within the scope of the present application.

Fig. 11 is a simplified schematic diagram illustrating a possible design structure of a terminal device according to an embodiment of the present application, where the terminal device may be one of the terminal devices shown in fig. 1 to 9. The terminal device includes a transceiver 111, a controller/processor 112, and may also include a memory 113 and a modem processor 114.

The transceiver 111 conditions (e.g., converts to analog, filters, amplifies, and frequency upconverts, etc.) the output samples and generates an uplink signal, which is transmitted via an antenna to the base station as described in the above embodiments. On the downlink, the antenna receives the downlink signal transmitted by the base station in the above embodiment. The transceiver 111 conditions (e.g., filters, amplifies, downconverts, and digitizes, etc.) the received signal from the antenna and provides input samples. Within modem processor 114, an encoder 1141 receives traffic data and signaling messages to be transmitted on the uplink and processes (e.g., formats, encodes, and interleaves) the traffic data and signaling messages. A modulator 1142 further processes (e.g., symbol maps and modulates) the coded traffic data and signaling messages and provides output samples. A decoder 1143 processes (e.g., deinterleaves and decodes) the symbol estimates and provides decoded data and signaling messages for transmission to the terminal devices. A demodulator 1144 processes (e.g., demodulates) the input samples and provides symbol estimates. The encoder 1141, modulator 1142, decoder 1143, and demodulator 1144 may be implemented by a combined modem processor 114. These elements are processed in accordance with the radio technology employed by the radio access network (e.g., access technologies of LTE and other evolved systems).

The controller/processor 112 controls and manages the operation of the terminal device for executing the processing performed by the terminal device in the above-described embodiment. The terminal device may determine whether the paging message includes an identifier of the terminal device, and if the paging message includes the identifier of the terminal device, send an RRC acknowledgement message to the second base station. As an example, the controller/processor 112 may be used to support the terminal device in performing the content of the terminal devices referred to in fig. 5 or fig. 9. The memory 113 is used to store program codes and data for the terminal device.

Fig. 12 shows a schematic diagram of the core network device involved in the above embodiments. The core network device may be the core network device in fig. 1 to 9. The core network equipment may include a controller/processor 121, memory 122, and a communication unit 123. The controller/processor 121 is configured to page a terminal device. The memory 122 may be used to store program codes and data for the core network devices. The communication unit 123 is configured to support the core network device to communicate with the first base station, for example, receive a paging failure indication message sent by the first base station.

The present application further provides a communication device, which may be the first base station in fig. 5 or fig. 9, as shown in fig. 13, where the communication device 130 includes:

a transceiver unit 131, configured to send a first request message, and if a second request message sent by a second base station of the one or more second base stations is received within a preset time duration, send a context of the target terminal to the second base station that sends the second request message, where the first request message is used to request the one or more second base stations located in a paging notification area of the target terminal to page the target terminal; the second request message is used for acquiring the context of the target terminal;

the processing unit 132 is configured to determine the first request message and the context of the target terminal.

In this application, the preset duration is a preset duration timed by a timer, and the processing unit is further configured to start the timer when the transceiver sends the first request message; when the transceiver unit receives, within a preset time duration, a second request message sent by a second base station of the one or more second base stations, the transceiver unit is specifically configured to: and receiving a second request message sent by one of the one or more second base stations within a preset time length timed by the timer.

In this application, the processing unit is further configured to: within a preset time length, when the transceiver does not receive a second request message sent by one of the one or more second base stations, judging whether the number of times that the first base station sends the first request message reaches a preset value; the transceiver unit is further configured to: and if the number of times of sending the first request message reaches the preset value, sending a paging failure indication message to core network equipment.

In this application, the processing unit is further configured to: and if the number of times of sending the first request message does not reach the preset value, adding 1 to the number of times of sending the first request message.

In this application, the transceiver unit is further configured to: and if the second request message sent by one of the one or more second base stations is not received within the preset time length, sending a paging failure indication message to the core network equipment.

In this application, the transceiving unit sends the first request message through an Xn or X2 port, and the transceiving unit receives the second request message through an Xn or X2 port.

In this application, the transceiving unit transmits the paging failure indication message through the NG port or the S1 port.

In this application, the paging failure indication message includes a message type field and a terminal identification field, where the message type field is used to indicate the type of the paging failure indication message, and the terminal identification field is used to indicate the identification of the paged target terminal.

In this application, the first request message at least includes a terminal identification field and a paging range area field, where the paging range area field is used to indicate a range area of the second base station that pages the target terminal; the terminal identification field is used for indicating the identification of the paged target terminal.

In this application, the first request message includes at least one of an international mobile subscriber identity IMSI field and a discontinuous reception DRX cycle field, where the IMSI field is used to indicate at least one bit of an IMSI of a paged target terminal, the DRX cycle field is used to indicate a DRX cycle of the target terminal, the DRX cycle field and the IMSI field are used by the second base station to determine a time for paging the target terminal, and the time for paging the target terminal refers to a time for sending a paging message including an identifier of the target terminal.

For the description of the paging method executed by the communication apparatus and the specific beneficial effects, refer to the first base station and the description of the related text in fig. 5 or fig. 9 in the above embodiments, which are not repeated herein.

There is also provided another communication apparatus, as shown in fig. 14, the communication apparatus 140 may correspond to the second base station in fig. 5 or fig. 9, and includes:

a transceiver 141, configured to receive a first request message sent by a first base station, send a paging message, and send a second request message to the first base station when receiving a response message sent by the target terminal, receive a context of the target terminal sent by the first base station, where the paging message is used to page the target terminal, and the second request message is used to obtain the context of the target terminal;

the processing unit 142 is configured to determine the paging message and the second request message.

In the application, the response message is an RRC connection setup confirmation message or an RRC connection recovery confirmation message.

In this application, the transceiving unit receives the first request message through an Xn or X2 port, and the transceiving unit transmits the second request message through an Xn or X2 port.

In this application, the first request message at least includes a terminal identification field and a paging range area field, where the paging range area field is used to indicate a range area of the second base station that pages the target terminal, and the terminal identification field is used to indicate an identification of the paged target terminal.

In this application, the processing unit is further configured to calculate, based on an IMSI field and a DRX cycle field in the first request message, a wake-up time of the target terminal; when the transceiver unit sends the paging message, the transceiver unit is specifically configured to: and sending the paging message at the awakening time of the target terminal.

In this application, the paging message includes a first identifier of the paged target terminal, or a second identifier of the paged target terminal, where the first identifier is a temporary mobile subscriber identifier S-TMSI or an international mobile subscriber identity IMSI of the paged target terminal, and the second identifier is another identifier of the paged target terminal except the S-TMSI or the IMSI.

For the description of the paging method executed by the communication apparatus and the specific beneficial effects, refer to the second base station and the description of the related text in fig. 5 or fig. 9 in the above embodiments, which are not repeated herein.

The present application provides another communication apparatus, as shown in fig. 15, where the communication apparatus 150 may correspond to the core network device in fig. 5 or fig. 9, and includes:

a transceiver 151, configured to receive a paging failure indication message sent by a first base station, where the paging failure indication message is used to indicate that a process of paging a target terminal by the first base station fails;

a processing unit 152, configured to trigger paging of the target terminal based on the paging failure indication message.

In this application, the paging failure indication message is configured to include a message type field and a terminal identification field, where the message type field is configured to indicate a type of the paging failure indication message, and the terminal identification field is configured to indicate an identification of a paged target terminal.

In this application, the transceiving unit receives the paging failure indication message through the NG port or the S1 port.

For the description of the paging method executed by the communication apparatus and the specific beneficial effects, reference may be made to the core network device and the description of the relevant text in fig. 5 or fig. 9 in the foregoing embodiments, which are not described herein again.

The present application provides another communication apparatus, as shown in fig. 16, the communication apparatus 160 may correspond to the terminal device in fig. 5 or fig. 9, and includes:

a transceiver unit 161, configured to receive a paging message sent by one or more second base stations and send a response message to one of the one or more second base stations; the paging message is sent when the one or more second base stations receive a first request message sent by a first base station, where the first request message is used to request the one or more second base stations located in a paging notification area of the terminal device to page the target terminal; the response message is used for the terminal equipment to establish RRC connection with the second base station;

a processing unit 162 for determining the response message.

In this application, the transceiver unit is further configured to receive paging messages sent by a plurality of second base stations; the processing unit is further to: selecting a second base station with the cell quality meeting the requirement from the plurality of second base stations; when the transceiver unit sends the response message to one of the one or more second base stations, the transceiver unit is specifically configured to: and sending a response message to the second base station with the cell quality meeting the requirement, wherein the response message is used for establishing RRC connection between the terminal equipment and the second base station with the cell quality meeting the requirement.

In this application, when the transceiver unit sends a response message to the second base station whose cell quality meets the requirement, the transceiver unit is specifically configured to: and when the paging message is determined to contain the first identifier of the terminal equipment, sending an RRC connection establishment confirmation message to the second base station with the cell quality meeting the condition.

In this application, when the transceiver unit sends a response message to the second base station whose cell quality meets the requirement, the transceiver unit is specifically configured to: and when the paging message is determined to comprise the second identifier of the terminal equipment, sending an RRC connection recovery confirmation message to the second base station with the cell quality meeting the requirement.

In this application, the transceiver unit is further configured to: receiving a paging message sent by a second base station;

when the transceiver unit sends the response message to one of the one or more second base stations, the transceiver unit is specifically configured to: and sending a response message to the second base station, wherein the response message is used for establishing RRC connection between the terminal equipment and the second base station.

In this application, when the transceiver unit sends the response message to the second base station, the transceiver unit is specifically configured to: and when determining that the paging message sent by one second base station comprises the first identifier of the terminal equipment, sending an RRC connection establishment confirmation message to the one second base station.

In this application, when the transceiver unit sends the response message to the second base station, the transceiver unit is specifically configured to: and when determining that the paging message sent by one second base station comprises the second identifier of the terminal equipment, sending an RRC connection recovery confirmation message to the second base station.

In this application, the first identifier is a temporary mobile subscriber identity S-TMSI or an international mobile subscriber identity IMSI of the terminal device.

In this application, the second identifier is an identifier of the terminal device other than the temporary mobile subscriber identity S-TMSI and the international mobile subscriber identity IMSI.

For the description of the paging method executed by the communication apparatus and the specific beneficial effects, refer to the terminal device and the description of the related text in fig. 5 or fig. 9 in the above embodiments, which are not described herein again.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method of communication, comprising:

a first base station sends a first request message, wherein the first request message is used for requesting one or more second base stations located in a paging notification area of a target terminal to page the target terminal; the first request message at least comprises a paging range area field, and the paging range area field is used for indicating the range area of a second base station for paging a target terminal; the paging area of the first base station triggering paging is smaller than the paging area of the core network equipment triggering paging;

if the first base station receives a second request message sent by one of the one or more second base stations within a preset time length, wherein the second request message is used for acquiring the context of the target terminal, the first base station sends the context of the target terminal to the second base station sending the second request message;

if the first base station does not receive a second request message sent by one of the one or more second base stations within a preset time length, sending a paging failure indication message to core network equipment; the paging failure indication message comprises a terminal identification field, and the terminal identification field is used for indicating the identification of the paged target terminal.

2. The method of claim 1, wherein the predetermined duration is a predetermined duration timed by a timer, and wherein the sending, by the first base station, the first request message comprises:

the first base station starts a timer;

the first base station sends a first request message;

the first base station receives, within a preset time period, a second request message sent by a second base station of the one or more second base stations, where the second request message includes:

and the first base station receives a second request message sent by one second base station in one or more second base stations within the preset time length timed by the timer.

3. The method of claim 1, wherein the sending a paging failure indication message to a core network device if the first base station does not receive a second request message sent by one of the one or more second base stations within a preset time duration comprises:

if the first base station does not receive a second request message sent by one of the one or more second base stations within a preset time length, judging whether the number of times that the first base station sends the first request message reaches a preset value;

and if the number of times of sending the first request message by the first base station reaches the preset value, sending a paging failure indication message to core network equipment.

4. The method of claim 3, further comprising:

and if the number of times of sending the first request message by the first base station does not reach the preset value, adding 1 to the number of times of sending the first request message, and executing the steps of sending the first request message again, if the number of times of sending the first request message by the first base station does not reach the preset value, receiving a second request message sent by one second base station of the one or more second base stations within a preset time length, sending the context of the target terminal to the second base station sending the second request, and if the number of times of sending the first request by the first base station does not reach the preset value within the preset time length, not receiving the second request message sent by one second base station of the one or more second base stations.

5. The method of claim 1, wherein the first base station sends the first request message through an Xn or X2 port, and wherein the first base station receives the second request message through an Xn or X2 port.

6. The method of claim 1, wherein the first base station sends the paging failure indication message through an NG port or an S1 port.

7. The method of claim 1, wherein the paging failure indication message further comprises a message type field, and wherein the message type field is used for indicating a type of the paging failure indication message.

8. The method of claim 1, wherein the first request message further comprises a terminal identification field; the terminal identification field is used for indicating the identification of the paged target terminal.

9. The method of claim 8, wherein the first request message includes an International Mobile Subscriber Identity (IMSI) field indicating at least one bit of an IMSI of the paged target terminal.

10. The method according to any of claims 1 to 9, wherein a Discontinuous Reception (DRX) cycle field is included in the first request message, and the DRX cycle field is used for indicating a DRX cycle of the target terminal.

11. A method of communication, comprising:

a second base station receives a first request message sent by a first base station, wherein the first request message is used for requesting the second base station positioned in a paging notification area of a target terminal to page the target terminal; the first request message at least comprises a paging range area field, and the paging range area field is used for indicating a range area of a second base station for paging the target terminal; the paging area of the first base station triggering paging is smaller than the paging area of the core network equipment triggering paging;

the second base station sends a paging message, and the paging message is used for paging a target terminal;

when receiving a response message sent by the target terminal, the second base station sends a second request message to the first base station, wherein the second request message is used for acquiring the context of the target terminal;

the second base station receives the context of the target terminal sent by the first base station;

the method further comprises the following steps:

the second base station receives the data sent by the first base station; the data is sent to the first base station by core network equipment;

and the second base station sends the data to the target terminal.

12. The method of claim 11, wherein the response message is an RRC connection setup confirmation message or an RRC connection recovery confirmation message.

13. The method of claim 11, wherein the second base station receives the first request message through an Xn or X2 port, and wherein the second base station sends the second request message through an Xn or X2 port.

14. The method of claim 11, wherein the first request message further comprises a terminal identification field; the terminal identification field is used for indicating the identification of the paged target terminal.

15. The method of claim 14 wherein the first request message includes an international mobile subscriber identity, IMSI, field indicating at least one bit of an IMSI of the paged target terminal.

16. The method of claim 11, wherein a Discontinuous Reception (DRX) cycle field is included in the first request message, and is used to indicate a DRX cycle of the target terminal.

17. The method of claim 16, wherein the second base station transmits a paging message, comprising:

the second base station calculates the awakening time of the target terminal based on the IMSI field and the DRX period field in the first request message;

and the second base station sends the paging message at the awakening time of the target terminal.

18. The method according to any of claims 11 to 17, wherein the paging message comprises a first identity of the paged target terminal, the first identity being a temporary mobile subscriber identity, S-TMSI, or an international mobile subscriber identity, IMSI, of the paged target terminal, or a second identity of the paged target terminal, the second identity being an identity of the paged target terminal other than S-TMSI or IMSI.

19. A method for paging, comprising:

a terminal device receives paging messages sent by one or more second base stations, wherein the paging messages are sent when the one or more second base stations receive a first request message sent by a first base station, and the first request message is used for requesting the one or more second base stations located in a paging notification area of the terminal device to page a target terminal; the first request message at least comprises a paging range area field, and the paging range area field is used for indicating the range area of a second base station for paging a target terminal; the paging area of the first base station triggering paging is smaller than the paging area of the core network equipment triggering paging;

the terminal equipment sends a response message to one of the one or more second base stations, wherein the response message is used for establishing Radio Resource Control (RRC) connection between the terminal equipment and the second base station;

the method further comprises the following steps:

the terminal equipment receives data sent by the second base station; and the data is sent to the second base station by the core network equipment through the first base station.

20. The method of claim 19, wherein the terminal device sends a response message to one of the one or more second base stations, comprising:

the terminal equipment receives paging messages sent by a plurality of second base stations;

the terminal equipment selects a second base station with the cell quality meeting the requirement from the plurality of second base stations;

and the terminal equipment sends a response message to the second base station with the cell quality meeting the requirement, wherein the response message is used for establishing RRC connection between the terminal equipment and the second base station with the cell quality meeting the requirement.

21. The method of claim 20, wherein the sending, by the terminal device, a response message to the second base station with the cell quality meeting the requirement comprises:

and when the terminal equipment determines that the paging message contains the first identifier of the terminal equipment, the terminal equipment sends an RRC connection establishment confirmation message to a second base station with the cell quality meeting the condition.

22. The method of claim 20, wherein the sending, by the terminal device, a response message to the second base station with the cell quality meeting the requirement comprises:

and when the terminal equipment determines that the paging message comprises the second identifier of the terminal equipment, sending an RRC connection recovery confirmation message to a second base station with the cell quality meeting the requirement.

23. The method of claim 19, wherein the terminal device sends a response message to one of the one or more second base stations, comprising:

the terminal equipment receives a paging message sent by a second base station;

and the terminal equipment sends a response message to the second base station, wherein the response message is used for establishing RRC connection between the terminal equipment and the second base station.

24. The method of claim 23, wherein the terminal device sends a response message to the one second base station, comprising:

and the terminal equipment sends an RRC connection establishment confirmation message to the second base station when determining that the paging message sent by the second base station comprises the first identifier of the terminal equipment.

25. The method of claim 23, wherein the terminal device sends a response message to the one second base station, comprising:

and the terminal equipment sends an RRC connection recovery confirmation message to the second base station when determining that the paging message sent by the second base station comprises the second identifier of the terminal equipment.

26. A method according to claim 21 or 24, characterised in that the first identity is a temporary mobile subscriber identity, S-TMSI, or an international mobile subscriber identity, IMSI, of the terminal device.

27. A method according to claim 22 or 25, characterised in that the second identity is the other identity of the terminal device than the temporary mobile subscriber identity, S-TMSI, and the international mobile subscriber identity, IMSI.

28. The method of claim 19, wherein the first request message further comprises a terminal identification field; the terminal identification field is used for indicating the identification of the paged target terminal.

29. The method of claim 28 wherein the first request message includes an international mobile subscriber identity, IMSI, field indicating at least one bit of an IMSI of the paged target terminal.

30. The method of claim 19, wherein a Discontinuous Reception (DRX) cycle field is included in the first request message to indicate a DRX cycle of the target terminal.

31. A first base station, comprising:

the transceiver is used for sending a first request message, and if the transceiver receives a second request message sent by one second base station of one or more second base stations within a preset time length, the transceiver sends the context of a target terminal to the second base station sending the second request message, wherein the first request message is used for requesting the one or more second base stations located in a paging notification area of the target terminal to page the target terminal; the second request message is used for acquiring the context of the target terminal; the first request message at least comprises a paging range area field, and the paging range area field is used for indicating the range area of a second base station for paging a target terminal; the paging area of the first base station triggering paging is smaller than the paging area of the core network equipment triggering paging;

a processor for determining a first request message and a context of a target terminal;

the processor is further configured to: within a preset time length, if the transceiver does not receive a second request message sent by one of the one or more second base stations, sending a paging failure indication message to core network equipment; the paging failure indication message comprises a terminal identification field, and the terminal identification field is used for indicating the identification of the paged target terminal.

32. The base station of claim 31, wherein the predetermined duration is a predetermined duration timed by a timer, and wherein the processor is further configured to start the timer when the transceiver sends the first request message;

when the transceiver receives, within a preset time duration, a second request message sent by a second base station of the one or more second base stations, the transceiver is specifically configured to: and receiving a second request message sent by one of the one or more second base stations within a preset time length timed by the timer.

33. The base station of claim 31, wherein the processor is further configured to: within a preset time length, when the transceiver does not receive a second request message sent by one of the one or more second base stations, judging whether the number of times that the first base station sends the first request message reaches a preset value;

the transceiver is further configured to: and if the number of times of sending the first request message reaches the preset value, sending a paging failure indication message to core network equipment.

34. The base station of claim 33, wherein the processor is further configured to: and if the number of times of sending the first request message does not reach the preset value, adding 1 to the number of times of sending the first request message.

35. The base station of claim 31, wherein the transceiver sends the first request message through an Xn or X2 port, and wherein the transceiver receives the second request message through an Xn or X2 port.

36. The base station of claim 31, wherein the transceiver sends the paging failure indication message through an NG port or an S1 port.

37. The base station of claim 31, wherein the paging failure indication message further comprises a terminal identification field, and wherein the terminal identification field is used for indicating an identification of a paged target terminal.

38. The base station of claim 31, wherein the first request message further comprises a terminal identification field, and wherein the paging area field is used to indicate an area of the second base station for paging the target terminal.

39. The base station of claim 38, wherein the first request message comprises an International Mobile Subscriber Identity (IMSI) field indicating at least one bit of the IMSI of the paged target terminal and a Discontinuous Reception (DRX) cycle field.

40. The base station according to any of claims 31 to 39, wherein a Discontinuous Reception (DRX) cycle field is included in the first request message, and wherein the DRX cycle field is used to indicate the DRX cycle of the target terminal.

41. A second base station, comprising:

a transceiver, configured to receive a first request message sent by a first base station, send a paging message, and send a second request message to the first base station when receiving a response message sent by a target terminal, and receive a context of the target terminal sent by the first base station, where the paging message is used to page the target terminal, the second request message is used to obtain the context of the target terminal, and the first request message is used to request a second base station located in a paging notification area of the target terminal to page the target terminal; the first request message at least comprises a paging range area field, and the paging range area field is used for indicating the range area of a second base station for paging a target terminal; the paging area of the first base station triggering paging is smaller than the paging area of the core network equipment triggering paging;

a processor configured to determine a paging message and a second request message;

the transceiver is further configured to receive data transmitted by the first base station; the data is sent to the first base station by core network equipment; and sending the data to the target terminal.

42. The base station of claim 41, wherein the response message is an RRC connection setup confirmation message or an RRC connection recovery confirmation message.

43. The base station of claim 41, wherein the transceiver receives the first request message through an Xn or X2 port, and wherein the transceiver sends the second request message through an Xn or X2 port.

44. The base station of claim 41, further comprising a terminal identification field in the first request message, wherein the terminal identification field is used to indicate the identification of the paged target terminal.

45. The base station of claim 44, wherein the first request message includes an International Mobile Subscriber Identity (IMSI) field indicating at least one bit of an IMSI for the paged target terminal.

46. The base station of claim 41, wherein the first request message comprises a Discontinuous Reception (DRX) cycle field, and wherein the DRX cycle field is used for indicating a DRX cycle of the target terminal.

47. The base station of claim 46, wherein the processor is further configured to calculate a time when the target terminal wakes up based on an IMSI field and a DRX cycle field in the first request message;

when the transceiver transmits the paging message, the transceiver is specifically configured to: and sending the paging message at the awakening time of the target terminal.

48. A base station according to any of claims 41 to 47, characterized in that said paging message comprises a first identity of the paged target terminal, said first identity being a temporary Mobile subscriber identity, S-TMSI, or an International Mobile subscriber identity, IMSI, of the paged target terminal, or a second identity of the paged target terminal, said second identity being an identity of the paged target terminal other than S-TMSI or IMSI.

49. A terminal device, comprising:

the transceiver is used for receiving the paging message sent by one or more second base stations and sending a response message to one of the one or more second base stations; the paging message is sent when the one or more second base stations receive a first request message sent by a first base station, and the first request message is used for requesting the one or more second base stations located in a paging notification area of the terminal device to page a target terminal; the response message is used for the terminal equipment to establish Radio Resource Control (RRC) connection with the second base station; the first request message at least comprises a paging range area field, and the paging range area field is used for indicating the range area of a second base station for paging a target terminal; the paging area of the first base station triggering paging is smaller than the paging area of the core network equipment triggering paging;

a processor for determining a response message;

the transceiver is further configured to receive data sent by the second base station; and the data is sent to the second base station by the core network equipment through the first base station.

50. The device of claim 49, wherein the transceiver is further configured to: receiving paging messages sent by a plurality of second base stations;

the processor is further configured to: selecting a second base station with the cell quality meeting the requirement from the plurality of second base stations;

when the transceiver sends the response message to one of the one or more second base stations, the transceiver is specifically configured to: and sending a response message to the second base station with the cell quality meeting the requirement, wherein the response message is used for establishing RRC connection between the terminal equipment and the second base station with the cell quality meeting the requirement.

51. The device according to claim 50, wherein the transceiver, when sending a response message to the second base station with the cell quality satisfying the requirement, is specifically configured to: and when the paging message contains the first identifier of the terminal equipment, sending an RRC connection establishment confirmation message to the second base station with the cell quality meeting the condition.

52. The device according to claim 50, wherein the transceiver, when sending a response message to the second base station with the cell quality satisfying the requirement, is specifically configured to: and when the paging message comprises the second identifier of the terminal equipment, sending an RRC connection recovery confirmation message to the second base station with the cell quality meeting the requirement.

53. The device of claim 49, wherein the transceiver is further configured to: receiving a paging message sent by a second base station;

when the transceiver sends the response message to one of the one or more second base stations, the transceiver is specifically configured to: and sending a response message to the second base station, wherein the response message is used for establishing RRC connection between the terminal equipment and the second base station.

54. The device according to claim 53, wherein said transceiver, when sending a response message to said one second base station, is specifically configured to: and when the paging message sent by the second base station is determined to comprise the first identifier of the terminal equipment, sending an RRC connection establishment confirmation message to the second base station.

55. The device according to claim 53, wherein said transceiver, when sending a response message to said one second base station, is specifically configured to: and when the paging message sent by the second base station is determined to include the second identifier of the terminal equipment, sending an RRC connection recovery confirmation message to the second base station.

56. The device according to claim 51 or 54, wherein the first identity is a temporary Mobile subscriber identity, S-TMSI, or an International Mobile subscriber identity, IMSI, of the terminal device.

57. The device according to claim 52 or 55, wherein the second identity is an identity of the terminal device other than a temporary mobile subscriber identity, S-TMSI, and an international mobile subscriber identity, IMSI.

58. The apparatus according to claim 49, wherein the first request message further comprises a terminal identification field; the terminal identification field is used for indicating the identification of the paged target terminal.

59. The apparatus of claim 49 wherein the first request message includes an International Mobile Subscriber Identity (IMSI) field indicating at least one bit of an IMSI for the paged target terminal.

60. The apparatus of claim 49, wherein the first request message comprises a Discontinuous Reception (DRX) cycle field for indicating a DRX cycle of the target terminal.